definition ph
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pH In chemistry, pH (/piːˈeɪtʃ/) is a numeric scale used to specify the acidity or basicity of an aqueous solution. It is approximately the negative of the logarithm to base 10 of the molar concentration, measured in units of moles per liter, of hydrogen ions.
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Glossary of Chemical Terms pH. the negative logarithm of the hydrogen ion concentration [H+]; a measure of the degree to which a solution is acidic or alkaline. An acid is a substance that can give up a hydrogen ion (H+); a base is a substance that can accept H+.
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pH pH. The pH of a solution is a measure of the molar concentration of hydrogen ions in the solution and as such is a measure of the acidity or basicity of the solution. The letters pH stand for power of hydrogen and the numerical value is defined as the negative base 10 logarithm of the molar concentration of hydrogen ions.
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Worm; Scarlet-Worm Tola`ath shani, scarlet, is the scarlet-worm, Cermes vermilio, a scale-insect which feeds upon the oak, and which is used for producing a red dye. It is called by the Arabs dudeh, a worm, a word also used for various insect larvae.
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What does PHstand for? pH, pH scale - (from potential of Hydrogen) the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and greater than 7 is more basic and less than 7 is more acidic);
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pH Definition and Equation in Chemistry Post. Share. pH Definition: pH is a measure of hydrogen ion concentration; a measure of the acidity or alkalinity of a solution. Aqueous solutions at 25°C with a pH less than seven are acidic, while those with a pH greater than seven are basic or alkaline. A pH level of is 7.0 at 25°C is defined as ' neutral ' because the concentration of H 3 O + equals the concentration of OH − in pure water. By Anne Marie Helmenstine, Ph.D.
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pH : a measure of acidity and alkalinity of a solution that is a number on a scale on which a value of 7 represents neutrality and lower numbers indicate increasing acidity and higher numbers increasing alkalinity and on which each unit of change represents a tenfold change in acidity or alkalinity and that is the negative logarithm of the effective ...
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The Key to Great Skin Let us explain—in case you snoozed through pH day in chemistry class: Introduced back in the early 1900s, pH stands for potential hydrogen and is used to describe the acid-alkaline ratio of a substance, which ranges from 0 (the most acidic) to 14 (the most alkaline).
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- In chemistry, pH is defined as the negative logarithm of the hydrogen-ion activity. More simply, it is. a measure of the relative amount of free hydrogen (H+) and hydroxyl ions (OH-). That is, it tells the. degree to which something—such as soil, water, or any solution—is basic or acidic. pH is reported.
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ph A scale which gives a measure of the acidity of an aqueous solution. A neutral solution has a pH of 7; an acidic solution has a lower value, and an alkaline solution a higher value.
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- Examples of pH Values. The pH of a solution is a measure of the molar concentration of hydrogen ions in the solution and as such is a measure of the acidity or basicity of the solution.
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acidic (ās'ĭd) Any of a class of compounds that form hydrogen ions when dissolved in water, and whose aqueous solutions react with bases and certain metals to form salts. Acids turn blue litmus paper red and have a pH of less than 7. Their aqueous solutions have a sour taste. Compare base.
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Swimming Pool pH Scales Simply, the pH of water that is either too acidic or too alkaline. What Does pH Stand For & pH Definition - The definition of pH is the negative log of hydrogen ion concentration in a water-based solution. It's an abbreviation for power of hydrogen. It has a range of 0 - 14 and 7.0 is neutral.
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What Are Acids, Bases, and pH All About, Anyway? The pH scale. The term pH symbolizes the hydrogen ion concentration in a solution (for example, what proportion of a solution contains hydrogen ions). The pH scale goes from 1—14. A pH of 7 is neutral, meaning that the amount of hydrogen ions and hydroxide ions in a solution are equal. For example, water has a pH of 7 because when water breaks up, the split is equitable into one hydrogen ion for every hydroxide ion.
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PH On a scale of 0 to 14, a pH o 7 represents neutrality. pH level that is below 7 indicates acidity whereas pH level above 7 indicates alkalinity. In biology, pH is an essential factor influencing the metabolic activities of a cell, a tissue, or an organism. The pH of different cellular compartments, body fluids, and organs is usually tightly regulated in a process called acid-base homeostasis.
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pH In chemistry, pH (/piːˈeɪtʃ/) is a numeric scale used to specify the acidity or alkalinity of an aqueous solution. It is the negative of the logarithm to base 10 of the activity of the hydrogen ion. Solutions with a pH less than 7 are acidic and solutions with a pH greater than 7 are alkaline or basic.Pure water is neutral, being neither an acid nor a base.n chemistry, pH (/piːˈeɪtʃ/) is a numeric scale used to specify the acidity or alkalinity of an aqueous solution. It is the negative of the logarithm to base 10 of the activity of the hydrogen ion. Solutions with a pH less than 7 are acidic and solutions with a pH greater than 7 are alkaline or basic.
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How to balance your pH and find out if youâre too acidic pH is the measure of the acidity or alkalinity of a substance. The pH scale runs from 0 to 14 — a lower number means a higher level of acidity (and generally less oxygen) is present, and higher number indicates a higher level of alkalinity. A solution is considered neutral, neither acid nor alkaline, when it has a pH of 7.
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What does pH balance mean? pH is a measure of how acidic a water-based solution is. Since our bodies are mostly water, pH can be used to describe how much acid is in the fluids in our bodies. Water has a pH of 7.0. pHs lower than 7 are acidic; pHs above 7 are basic, or alkaline. Our bodies maintain our blood at a pH of about 7.4.
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Alkaline Definition Definition: Alkaline refers to an aqueous solution having a pH greater than 7 or having a [OH - ] greater than 10 -7.
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All-1B-allanswer - CHAPTER 14 CHEMICAL KINETICS PRACTICE... pH. the negative logarithm of the hydrogen ion concentration [H+]; a measure of the degree to which a solution is acidic or alkaline. An acid is a substance that can give up a hydrogen ion (H+); a base is a substance that can accept H+.The more acidic a solution the greater the hydrogen ion concentration and the lower the pH; a pH of 7.0 indicates neutrality; a pH of less than 7 indicates acidity, and a pH of more than 7 indicates alkalinity.H. In chemistry, a measure of the hydrogen ion concentration of a solution. The degree of acidity or alkalinity of a substance is expressed in a pH value. A solution that is neither acid nor alkaline has a pH of 7.
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Using pH as a Health Monitor pH: What does it mean? pH is the abbreviation for potential hydrogen. The pH of any solution is the measure of its hydrogen-ion concentration. The higher the pH reading, the more alkaline and oxygen rich the fluid is. The lower the pH reading, the more acidic and oxygen deprived the fluid is.
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pH Indicator Definition Definition: A pH indicator is a compound that changes color in solution over a narrow range of pH values. Examples: Methyl red is a pH indicator used to identify pH values between 4.4 and 6.2. Bromocresol green is a pH indicator used to identify pH values between 3.8 and 5.4.
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pH  (chemistry) (chemistry) p(otential of) H(ydrogen); the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and greater than 7 is acidic and less than 7 is basic).
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pH and Buffers A buffer is any substance that minimizes change in the pH of a solution. Most buffers consist of a combination of a weak acid and the weak base, where the base is the anion remaining after the weak acid dissociates (separates) to release H+ ions.
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pH Measurements pH is a logarithmic measure of the hydrogen ion concentration of an aqueous solution: pH = -log[H+] where log is the base 10 logarithm and [H+] is the hydrogen ion concentration in moles per liter. pH describes how acidic or basic an aqueous solution is, where a pH below 7 is acidic and a pH greater than 7 is basic. pH of 7 is considered neutral (e.g., pure water). Typically, values of pH range from 0 to 14, although very strong acids may have a negative pH, while very strong bases may have a pH exceeding 14. The term pH was first described by Danish biochemist Søren Peter Lauritz Sørensen in 1909. pH is an abbreviation for power of hydrogen where p is short for the German word for power, potenz and H is the element symbol for hydrogen. Why pH Measurements Are Important
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- pH is a measure of the hydorgen ion concentration of a solution. Solutions with a high concentration of hydrogen ions have a low pH and solutions with a low concentrations of H+ ions have a high pH. This may seem like a confusion way to express these reationships, and it is, until you understand what pH stands for. The equation that defines pH is given as follows: